US20040040137A1 - Rotatable and telescopic work machine - Google Patents
Rotatable and telescopic work machine Download PDFInfo
- Publication number
- US20040040137A1 US20040040137A1 US10/230,811 US23081102A US2004040137A1 US 20040040137 A1 US20040040137 A1 US 20040040137A1 US 23081102 A US23081102 A US 23081102A US 2004040137 A1 US2004040137 A1 US 2004040137A1
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- United States
- Prior art keywords
- frame assembly
- work machine
- upper frame
- assembly
- assemblies
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
- E02F9/123—Drives or control devices specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/065—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted
- B66F9/0655—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks non-masted with a telescopic boom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07545—Overhead guards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07559—Stabilizing means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/283—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a single arm pivoted directly on the chassis
- E02F3/286—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a single arm pivoted directly on the chassis telescopic or slidable
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/02—Travelling-gear, e.g. associated with slewing gears
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0833—Improving access, e.g. for maintenance, steps for improving driver's access, handrails
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
Definitions
- This invention relates generally to a rotatable and telescopic work machine and, more particularly, to a rotatable and telescopic work machine having a low clearance height, a low center of gravity, and unobstructed operator visibility.
- the overall height of the work machine is generally increased due to the “stacking” of various components, such as, the rotation means, cab, engine and telescopic boom.
- the significant height of the work machine limits its ability to enter certain work areas or buildings that have space constraints at access doors, service entries, and the like.
- the positioning of the various components on some of these work machines causes weight distribution problems as the center of gravity is elevated and focused. Weight distribution problems can reduce efficiency or performance of the work machine.
- an elevated center of gravity reduces stability of the work machine and reduces operator visibility as the various components are placed at higher levels. Visibility may be further impaired on some of these work machines when the telescopic boom is mounted on one side of the cab and blocks the operator's view of a work implement, attached to the telescopic boom, or the surrounding terrain.
- U.S. Pat. No. 4,216,869 issued to John J. Grove on Aug. 12, 1980 discloses an industrial crane that has a chassis mounting a housing.
- the chassis has a horizontal deck with a central well that provides access to a bearing for a rotatable upper works.
- the upper works has a portion that extends into the well and to the bearing.
- the upper works also includes a cab directly over the bearing, a boom support rearward of the cab, an engine rearward of the boom support and above the chassis, and a lifting boom journalled to the boom support rearward of and extending forwardly over the cab.
- the boom, cab, and engine have their lateral centers in line along the median plane of the upper works.
- the median plane of the upper works coincides with the median plane of the chassis when the upper works is in the forward or reverse position.
- the positioning of a portion of the upper works within the well assists in lowering the center of gravity of the crane
- the positioning of the engine above the chassis distributes weight at an elevated level that nullifies the low center of gravity benefits.
- the positioning of the engine rearward of the boom support may create an unfavorable distribution of weight at the rear of the crane, lowering its efficiency and stability.
- the positioning of the engine in such a manner results in a low clearance height for the swing radius of the boom and effectively blocks all rear visibility for the operator during operation of the crane.
- the excavator includes a vessel-like lower frame with a vertical side wall and a bottom wall that forms a support plate.
- An upper frame is mounted on the lower frame for rotation about a vertical axis.
- the upper frame carries a cabin, a boom, and a bucket assembly.
- the engine and other heavy equipment components for operating the excavator along with the rotation means are secured to the underside of the upper frame in a suspended manner.
- the rotating means engages with a gear in the lower frame.
- the height of the excavator is still defined by the full height of the lower and upper frames due to the upper frame being “stacked” on the lower frame. While this may not be as great an issue in a rotatable excavator that typically works in an external environment, any increase of height in a rotatable and telescopic work machine lowers its accessibility to enclosed work areas or buildings that have space constrained entryways.
- the present invention is directed to overcoming one or more of the problems as set forth above.
- a work machine that has vertical axis.
- the work machine has a lower frame assembly with a recessed area therein.
- An upper frame assembly is connected with the lower frame assembly to allow independent rotation about the vertical axis.
- An operator portion of the upper frame assembly is at least partially positioned within the recessed area of the lower frame assembly.
- a power source is connected with the upper frame assembly and is at least partially positioned within the recessed area of the lower frame assembly.
- a work machine with a vertical axis has a lower frame assembly with top and bottom surfaces and a predetermined height.
- An upper frame assembly is connected with the lower frame in a manner that allows independent rotation about the vertical axis and has a predetermined height.
- a portion of the height of the upper frame assembly defines a portion of the height of the lower frame assembly.
- Driving means is included that has top and bottom surfaces as well as a midpoint substantially therebetween. The driving means supports the lower and upper frame assemblies with the top surface of the lower frame assembly being equal with or below the top surface of the driving means and the bottom surface of the lower frame assembly being equal with or below the midpoint of the driving means.
- a work machine that has a vertical axis.
- the work machine comprises a lower frame assembly that defines a recessed area therein.
- Rotation means has a defined opening therethrough and is at least partially disposed within the recessed area of the lower frame assembly and connected therewith.
- An upper frame assembly is connected with the rotation means for independent rotation about the vertical axis and includes an operator portion. The operator portion is at least partially disposed within the opening of the rotation means.
- a method for an operator to access a work machine.
- the work machine has a lower frame assembly, an upper frame assembly connected with the lower frame assembly and a vertical axis.
- the upper frame assembly is rotatable about the vertical axis relative to the lower frame assembly.
- the method includes positioning a lower portion of the upper frame assembly in the lower frame assembly.
- the method further includes connecting the upper frame assembly with the lower frame assembly to define a step area.
- the method further includes stepping up from the ground to the step area and stepping down from the step area to the lower portion of the upper frame assembly.
- a method of manufacturing and assembling a work machine to achieve various size configurations for the work machine.
- the method includes the steps of manufacturing a plurality of various sized lower frame assemblies, manufacturing a common and predetermined sized open area within each of the plurality of lower frame assemblies, manufacturing a plurality of upper frame assemblies, manufacturing a plurality of various sized boom assemblies, identifying a first select boom assembly from the plurality of boom assemblies, connecting the first select boom assembly with a first one of the plurality of upper frame assemblies, positioning the first one of the plurality of upper frame assemblies through the open area in a first one of the plurality of lower frame assemblies, and connecting the first one of the plurality of upper frame assemblies with the first one of the plurality of lower frame assemblies.
- the present invention is a rotatable work machine that includes a lower frame assembly having an open area in which the operator portion of an upper frame assembly and power source are at least partially positioned. This serves to reduce the overall height of the work machine to the point where it can easily access enclosed work areas or buildings having space constrained entryways. Additionally, specific positioning of the various components at a lower level on the work machine provides a low center of gravity with improved operator visibility. Further, the manufacturing and assembly of the work machine is such that costs and complexity are reduced.
- FIG. 1 is a diagrammatic, perspective representation of the present invention featuring an improved rotatable and telescopic work machine
- FIG. 2 is the diagrammatic, perspective representation of the work machine of FIG. 1 with an upper frame assembly rotated in relation to a lower frame assembly;
- FIG. 3 is a side view of the work machine showing the location and positioning of a cab assembly and various components in relation to the upper and lower frame assemblies;
- FIG. 4 is a side view of the work machine with some components removed to show the cab assembly pivoted forward to a maintenance position;
- FIGS. 5 a - 5 e are diagrammatic, perspective representations showing the various stages for manufacturing and assembling the work machine
- FIG. 6 is a diagrammatic, panoramic view from inside the cab assembly of the work machine as would be seen by an operator seated therein;
- FIG. 7 is a diagrammatic, section view, taken along line 7 - 7 in FIG. 3, showing a step area for accessing the cab assembly of the work machine;
- FIG. 8 is a diagrammatic side view of the work machine with various components removed to outline the cab assembly and surrounding components in relation to a pair of axle assemblies;
- FIG. 9 is a partial, perspective view of a slew ring assembly used on the work machine to achieve rotational movement of the upper frame assembly.
- a rotatable and telescopic work machine 10 is shown. It should be understood that although the work machine shown includes telescopic capabilities, any work machine having an upper rotatable portion is conceivably within the scope of the invention.
- the work machine 10 has a front end portion 14 , a rear end portion 18 and a central portion 22 through which a vertical axis 26 extends.
- the work machine 10 includes a mainframe assembly 34 , seen best in FIGS. 3 - 4 , that is supported against the ground 38 by driving means, such as a pair of front and rear wheels 42 , 44 .
- driving means such as a pair of front and rear wheels 42 , 44 .
- any suitable driving means such as a metallic or rubber track, might be utilized in place of the wheels 42 , 44 and still be within the scope of the invention.
- the wheels 42 , 44 each have top and bottom surfaces 46 , 50 , respectively, and a midpoint 54 located substantially at the mid-portion of the wheels 42 , 44 .
- the wheels 42 , 44 are connected with the work machine 10 through a pair of axle assemblies 58 , 60 .
- a power source 64 such an internal combustion engine, is hydraulically connected with a pair of motors 68 , 72 through a swivel coupling 76 . It should be understood that any other suitable device or means, such as mechanical, electrical or electronic, may be used to transmit power to the axle assemblies 58 , 60 for driving the work machine 10 over a variety of terrains (not shown).
- a cooling system 78 is connected with the power source 64 and is used for cooling various fluids used within the work machine 10 .
- the mainframe assembly 34 includes a lower frame assembly 80 and an upper frame assembly 84 .
- the lower and upper frame assemblies 80 , 84 are manufactured and assembled with a predetermined method 86 to achieve various size configurations for the work machine 10 .
- the lower frame assembly 80 has a body portion 88 that includes a front end 92 , a rear end 96 , a substantially planar top surface 100 , a substantially planar bottom surface 104 and a predetermined vertical height H1 measured between the bottom and top surfaces 104 , 100 , as seen in FIG. 7.
- the body portion 88 further includes an inner, open area 108 that is recessed therein to define a floor 112 adjacent the bottom surface 104 and accessible with the ground 38 .
- a ledge 116 extends from the body portion 88 between the top and bottom surfaces 100 , 104 and into the recessed area 108 .
- a pair of arms 120 , 124 extend substantially upwardly and outwardly from the body portion 88 at the respective front and rear ends 92 , 96 for mounting the axle assemblies 58 , 60 in a spaced relationship with the body portion 88 .
- the body portion 88 and arms 120 , 124 are shown constructed with a plurality of interconnected and welded metallic plates, as seen in FIGS.
- the body portion 88 may be constructed in any suitable manner, such as by any suitable molding process, as long as a strong and reliable support platform is created.
- a foot holding area 128 is defined within the body portion 88 between the bottom and top surfaces 104 , 100 .
- a tread plate 132 shown in FIG. 7, is connected on the top surface 100 of the body portion 88 and is operative with the foot holding area 128 to assist an operator (not shown) during ingress to or egress from the work machine 10 .
- pairs of spaced front and rear stabilizer leg assemblies are pivotally connected via a mounting bracket 144 at each of the front and rear ends 92 , 96 of the lower frame assembly 80 .
- the stabilizer leg assemblies 140 are movable diagonally outward from a fully retracted position 148 to a fully extended position 152 .
- the rear stabilizer leg assemblies 140 are positioned between the rear wheels 44 when in the fully retracted position 148 and positioned outside the rear wheels 44 when in the fully extended position 152 .
- the front stabilizer leg assemblies 140 are positioned between the front wheels 42 when in the fully retracted position 148 and positioned outside the front wheels 42 when in the fully extended position 152 .
- the stabilizer leg assemblies 140 define an outline or footprint 156 having a substantially square configuration when in the extended position 152 and in contact with the ground 38 .
- the upper frame assembly 84 has a lower portion 160 positioned within the recessed area 108 of the lower frame assembly 80 and an upper or support portion 164 extending from the lower portion 160 .
- the upper frame assembly 84 has a predetermined height H2 that is measured between the lower and upper portions 160 , 164 and defines a portion of the height H1 of the lower frame assembly 80 .
- the lower portion 160 includes an operator portion 168 with front and rear ends 172 , 176 , respectively, and an enclosure portion 180 adjacent the operator portion 168 .
- the upper portion 164 includes a pair of spaced tower assemblies 184 , 188 positioned at the rear end 172 of the operator portion 168 that define a substantially non-obstructed viewing area 196 from the rear end 172 of the operator portion 168 to the surrounding terrain (not shown).
- the tower assemblies 184 , 188 are connected via a reinforcing wall 200 extending therebetween that substantially separates the operator portion 168 from the enclosure portion 180 .
- the reinforcing wall 200 defines a rear window 204 therethrough that is operative with the substantially non-obstructed viewing area 196 .
- the power source 64 is connected at the lower portion 160 of the upper frame assembly 84 and positioned within the enclosure portion 180 and substantially between the tower assemblies 184 , 188 .
- a counterweight 206 is positioned at the upper portion 164 and spaced from the power source 64 .
- a portion of the cooling system 78 such as a heat exchanger 207 , may be positioned within the upper portion 164 adjacent the tower assemblies 184 , 188 and counterweight 206 . It should be understood that one or more heat exchangers 207 may be positioned within the upper portion 164 .
- a laterally extending shelf 208 is connected between the upper and lower portions 164 , 160 of the upper frame assembly 84 .
- the shelf 208 has upper and lower surfaces 212 , 216 and an overlapping relationship with the top surface 100 of the lower frame assembly 80 .
- a tread ring 220 is connected at the upper surface 212 of the upper shelf 208 in mating relationship with the tread plate 132 to define a substantially planar step area 224 therebetween that provides a method 226 for the operator (not shown) to access the work machine 10 .
- tread plate 132 and tread ring 220 are shown as separate components connected with the respective lower and upper frame assemblies 80 , 84 , it should be understood that the top surface 100 of the lower frame assembly 80 and the upper surface 212 of the upper frame assembly 84 may be textured to provide an equivalent step area 224 without the use of the separate tread plate and ring 132 , 220 .
- rotation means 240 such as a slew ring assembly, is connected between the upper and lower frame assemblies 84 , 80 , respectively, to allow independent rotation of the upper frame assembly 84 around the lower frame assembly 80 .
- rotation means such as any suitable gearing or bearing system, may be used in place of the slew ring assembly and still be within the scope of the invention.
- the slew ring assembly 240 is substantially positioned within the recessed area 108 .
- the slew ring assembly 240 has a first, inner ring portion 244 with an inner surface having a plurality of teeth 248 , a second, outer ring portion 252 and a bearing assembly 256 positioned between the inner and outer ring portions 244 , 252 .
- the inner and outer ring portions 244 , 252 define an opening 260 therethrough through which the lower portion 160 of the upper frame assembly 84 is positioned.
- the positioning of the upper frame assembly 84 in such a manner correspondingly positions the operator portion 168 and enclosure portion 180 at least partially within the recessed area 108 .
- the inner ring portion 244 is connected with an upper surface on the ledge 116 of the lower frame assembly 80 .
- the outer ring portion 252 is connected with the lower surface 216 on the shelf 208 of the upper frame assembly 84 .
- a drive gear 264 is connected with the upper shelf 208 and extends inwardly for positioning within the recessed area 108 .
- the outer ring portion 252 and the drive gear 228 are positioned in a spaced relationship on opposite sides of the inner ring portion 244 .
- the drive gear 228 is powered in any suitable manner, such as through a drive motor (not shown), and engages with the plurality of teeth 248 to facilitate the rotation of the upper frame assembly 84 about the vertical axis 26 via the propulsion of the outer ring portion 252 around the inner ring portion 244 as allowed by the bearing assembly 256 .
- the slew ring assembly 240 is shown having separate inner and outer ring portions 244 , 252 , it should be obvious that the ring portions may be integrally formed with the respective upper and lower frame assemblies 84 , 80 . Further, it should be understood that any suitable rotation means, other than the slew ring assembly 240 , may be utilized between the upper and lower frame assemblies 84 , 80 and is within the scope of the invention.
- an operator station or cab assembly 270 is connected with the upper frame assembly 84 at pivot joint 274 for rotation therewith about the vertical axis 274 .
- the cab assembly 270 has a lower portion 276 positioned within the operator portion 168 for partial seating within the recessed area 108 .
- the cab assembly 270 is moveable at the pivot joint 274 between an operating position 278 , shown in FIG. 3, that substantially encloses the operator portion 168 and a maintenance position 282 , shown in FIG. 4 , that allows access to the power source 64 , swivel coupling 76 , and various other surrounding components.
- the cab assembly 270 includes a seat 286 therein for seating a portion of an operator's body (not shown) within the recessed area 108 .
- Steering means 290 adjacent the seat 286 is connected with the power source 64 for driving the wheels 42 , 44 .
- Electrical means 294 such as a switch, is positioned within the cab assembly 270 to prevent the rotation of the upper frame assembly 84 if desired by the operator (not shown). It should be understood that any other suitable means, such as mechanical or electronic, may be used to prevent the rotation of the upper frame assembly 84 .
- a boom assembly 300 is pivotally mounted at the upper portion 164 of the upper frame assembly 84 for rotation therewith about the vertical axis 26 .
- the boom assembly 300 is positioned above the operator portion 168 opposite the lower frame assembly 80 .
- the boom assembly 300 is moveable between a lowered position 304 , shown in FIG. 3, that defines a spaced and parallel relationship with the lower frame assembly 80 and a plurality of angled positions, one of which is shown in FIG. 4 at 308 . It should be understood that an angled position, such as that shown at 308 , is necessary in order for the cab assembly 270 to pivot to the maintenance position 282 .
- the boom assembly 300 is also moveable telescopically between a retracted position 312 , shown in FIG.
- An implement 320 such as forks, is positioned at the front end of the boom assembly 300 in a well-known manner. It should be understood that any implement may be utilized with the boom assembly 300 other than that shown.
- the boom assembly 300 traverses the vertical axis 26 , as seen best in FIG. 6, and is positioned in the manner described so that a substantially non-obstructed viewing area 324 is established from the front end 172 of the operator portion 168 , where an operator (not shown) is seated, to the implement 320 .
- the boom assembly 300 is spaced from the ground 38 at its connection with the upper frame assembly 84 to define a mounting height H3 that allows for an elevated swing radius height H4 for the work machine 10 that is equal to or greater than six feet.
- the wheels 42 , 44 , lower frame assembly 80 , upper frame assembly 84 and boom assembly 300 define an overall work machine height H5.
- the work machine height H5 is substantially equal to the clearance height H3 and, preferably, equal to or greater than six feet and less than nine feet.
- the method 86 involves manufacturing a plurality of lower frame assemblies 80 having various sizes, measured by length, width, height or shape, as seen in FIG. 5 a . However, each of the lower frame assemblies 80 is manufactured with the recessed area 108 being of a common and predetermined size. A plurality of upper frame assemblies 84 is also manufactured. A select lower frame assembly 80 is identified that provides and corresponds with a desired size configuration of the work machine 10 , as depicted in FIG. 5 b . As shown in FIG.
- the lower portion 160 of one of the upper frame assemblies 84 is positioned through and into the recessed area 108 of the select lower frame assembly 80 and connected therewith to define the step area 224 for accessing the work machine 10 .
- the upper frame assembly 84 is rotatable about the vertical axis 26 relative to the select lower frame assembly 80 as allowed by the slew ring assembly 240 .
- the power source 64 is also positioned through and partially into the recessed area 108 for connection and rotation with the upper frame assembly 84 .
- the lower portion 276 of the cab assembly 270 is positioned through and recessed into the lower portion 160 of the upper frame assembly 84 for pivotal connection and rotation therewith, as described previously. Referring to FIG.
- the boom assembly 300 and attached implement 320 are connected at the upper portion 164 of the upper frame assembly 84 .
- the counterweight 206 and heat exchanger 207 are positioned adjacent the boom assembly 300 at the upper portion 164 of the upper frame assembly 84 to complete the assembly of the work machine 10 .
- the position of the power source 64 is such that is acts as a low counterweight for the work machine 10 .
- the heat exchanger 207 is positioned adjacent the counterweight 206 and operative therewith to act as a high counterweight for the work machine 10 in conjunction with the power source 64 throughout rotation of the upper frame assembly 84 about the vertical axis 26 to improve stability of the work machine 10 , especially during lifting operations. Further, the positioning of the major components, as described and shown, lowers the center of gravity to enhance stability and performance attributes of the work machine 10 .
- the top surface 100 of the lower frame assembly 80 is maintained at or below the top surface 46 of the wheels 42 , 44 while the bottom surface 104 of the lower frame assembly 80 is maintained at or below the midpoint 54 of the wheels 42 , 44 .
- the low position of the power source 64 and the high position of the heat exchanger 207 allow the non-obstructed viewing area 196 for the operator (not shown) from the rear end 176 to the surrounding terrain (not shown).
- the positioning of the boom assembly 300 at the upper portion 164 of the upper frame assembly 84 for traversing the vertical axis 26 allows the non-obstructed viewing area 324 for the operator (not shown) from the front end 172 to the implement 320 .
- the plurality of lower frame assemblies 80 are manufactured with a consistent length, width, height or shape.
- the stabilizers leg assemblies 140 , boom assembly 300 , and counterweight 206 may be manufactured to establish the varying work machine size configurations without changing the length, width, height or shape of the lower frame assemblies 80 . Therefore, the stabilizer leg assemblies 140 , boom assemblies 300 , and counterweights 206 are the only components that must be manufactured in different sizes to produce a work machine 10 of varying size configurations.
- the stabilizer leg assembly 140 may be of a telescopic type, as shown in FIG. 5 a , to enlarge the footprint 156 .
- the boom assemblies 300 would be of various lengths and telescopic capability and the counterweights would correspond to the various size configurations of the work machine 10 .
- the ability to change only the stabilizer leg assemblies 140 , boom assembly 300 , and counterweight 300 instead of the lower frame assembly 80 reduces overall manufacturing costs by eliminating the necessity of manufacturing various sized and more complex and expensive lower frame assemblies 80 .
- the positioning and connection of the various sized stabilizer leg assemblies 140 , boom assemblies 300 , and counterweights 206 would remain substantially consistent on each work machine 10 to simplify the assembly process throughout the various size configurations.
- the operator Prior to operation, the operator (not shown) utilizes the method 226 to access the machine by stepping from the ground 38 to the foot holding area 128 and onto the step area 224 defined between the lower and upper frame assemblies 80 , 84 .
- the operator enters the cab assembly 270 by stepping down from the step area to the lower portion 276 thereof, which, simultaneously, positions a portion of the operator (not shown) within the lower portion 160 of the upper frame assembly 84 . Due to the mating relationship between the lower and upper frame assemblies 80 , 84 , the step area 224 is maintained throughout rotation of the upper frame assembly 84 . In this manner, the operator (not shown) may easily access the work machine 10 at various locations around its periphery, reducing time and costs associated with other work machines having limited access locations.
- the upper frame assembly 84 including the other various rotatable components, such as the power source 64 , cab assembly 270 and boom assembly 300 , may be rotated about the vertical axis 26 while the work machine 10 is moving or stationary.
- movement of the work machine 10 is enhanced between various locations because the low center of gravity establishes the low overall height H5 and enables the work machine 10 to enter space or height constrained areas.
- the stabilizers 140 are extended to achieve the substantially square footprint 156 and improve the overall stability of the work machine 10 .
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Abstract
Description
- This invention relates generally to a rotatable and telescopic work machine and, more particularly, to a rotatable and telescopic work machine having a low clearance height, a low center of gravity, and unobstructed operator visibility.
- In current rotatable and telescopic work machines, such as material handling machines, the overall height of the work machine is generally increased due to the “stacking” of various components, such as, the rotation means, cab, engine and telescopic boom. The significant height of the work machine limits its ability to enter certain work areas or buildings that have space constraints at access doors, service entries, and the like. Further, the positioning of the various components on some of these work machines causes weight distribution problems as the center of gravity is elevated and focused. Weight distribution problems can reduce efficiency or performance of the work machine. Additionally, an elevated center of gravity reduces stability of the work machine and reduces operator visibility as the various components are placed at higher levels. Visibility may be further impaired on some of these work machines when the telescopic boom is mounted on one side of the cab and blocks the operator's view of a work implement, attached to the telescopic boom, or the surrounding terrain.
- One known rotatable and telescopic work machine, U.S. Pat. No. 4,216,869 issued to John J. Grove on Aug. 12, 1980, discloses an industrial crane that has a chassis mounting a housing. The chassis has a horizontal deck with a central well that provides access to a bearing for a rotatable upper works. The upper works has a portion that extends into the well and to the bearing. The upper works also includes a cab directly over the bearing, a boom support rearward of the cab, an engine rearward of the boom support and above the chassis, and a lifting boom journalled to the boom support rearward of and extending forwardly over the cab. The boom, cab, and engine have their lateral centers in line along the median plane of the upper works. The median plane of the upper works coincides with the median plane of the chassis when the upper works is in the forward or reverse position. Although the positioning of a portion of the upper works within the well assists in lowering the center of gravity of the crane, the positioning of the engine above the chassis distributes weight at an elevated level that nullifies the low center of gravity benefits. Additionally, the positioning of the engine rearward of the boom support may create an unfavorable distribution of weight at the rear of the crane, lowering its efficiency and stability. Further, the positioning of the engine in such a manner results in a low clearance height for the swing radius of the boom and effectively blocks all rear visibility for the operator during operation of the crane.
- Other rotatable work machines that do not have telescopic booms, such as excavators, may also have similar deficiencies as those work machines with telescopic booms. For example, U.S. Pat. No. 4,102,461 issued to Ingebret Soyland on Jul. 25, 1978, discloses a rotatable excavator with a low center of gravity. The excavator includes a vessel-like lower frame with a vertical side wall and a bottom wall that forms a support plate. An upper frame is mounted on the lower frame for rotation about a vertical axis. The upper frame carries a cabin, a boom, and a bucket assembly. The engine and other heavy equipment components for operating the excavator along with the rotation means are secured to the underside of the upper frame in a suspended manner. In order to rotate the upper frame, along with the boom, bucket assembly, and engine, the rotating means engages with a gear in the lower frame. Although the center of gravity is lowered and visibility is improved in this excavator design, the height of the excavator is still defined by the full height of the lower and upper frames due to the upper frame being “stacked” on the lower frame. While this may not be as great an issue in a rotatable excavator that typically works in an external environment, any increase of height in a rotatable and telescopic work machine lowers its accessibility to enclosed work areas or buildings that have space constrained entryways.
- The present invention is directed to overcoming one or more of the problems as set forth above.
- In one aspect of the present invention, a work machine is disclosed that has vertical axis. The work machine has a lower frame assembly with a recessed area therein. An upper frame assembly is connected with the lower frame assembly to allow independent rotation about the vertical axis. An operator portion of the upper frame assembly is at least partially positioned within the recessed area of the lower frame assembly. A power source is connected with the upper frame assembly and is at least partially positioned within the recessed area of the lower frame assembly.
- In another aspect of the present invention, a work machine with a vertical axis is disclosed. The work machine has a lower frame assembly with top and bottom surfaces and a predetermined height. An upper frame assembly is connected with the lower frame in a manner that allows independent rotation about the vertical axis and has a predetermined height. A portion of the height of the upper frame assembly defines a portion of the height of the lower frame assembly. Driving means is included that has top and bottom surfaces as well as a midpoint substantially therebetween. The driving means supports the lower and upper frame assemblies with the top surface of the lower frame assembly being equal with or below the top surface of the driving means and the bottom surface of the lower frame assembly being equal with or below the midpoint of the driving means.
- In yet another aspect of the present invention, a work machine is disclosed that has a vertical axis. The work machine comprises a lower frame assembly that defines a recessed area therein. Rotation means has a defined opening therethrough and is at least partially disposed within the recessed area of the lower frame assembly and connected therewith. An upper frame assembly is connected with the rotation means for independent rotation about the vertical axis and includes an operator portion. The operator portion is at least partially disposed within the opening of the rotation means.
- In yet another aspect of the present invention, a method is disclosed for an operator to access a work machine. The work machine has a lower frame assembly, an upper frame assembly connected with the lower frame assembly and a vertical axis. The upper frame assembly is rotatable about the vertical axis relative to the lower frame assembly. The method includes positioning a lower portion of the upper frame assembly in the lower frame assembly. The method further includes connecting the upper frame assembly with the lower frame assembly to define a step area. The method further includes stepping up from the ground to the step area and stepping down from the step area to the lower portion of the upper frame assembly.
- In yet another aspect of the present invention, a method of manufacturing and assembling a work machine is disclosed to achieve various size configurations for the work machine. The method includes the steps of manufacturing a plurality of various sized lower frame assemblies, manufacturing a common and predetermined sized open area within each of the plurality of lower frame assemblies, manufacturing a plurality of upper frame assemblies, manufacturing a plurality of various sized boom assemblies, identifying a first select boom assembly from the plurality of boom assemblies, connecting the first select boom assembly with a first one of the plurality of upper frame assemblies, positioning the first one of the plurality of upper frame assemblies through the open area in a first one of the plurality of lower frame assemblies, and connecting the first one of the plurality of upper frame assemblies with the first one of the plurality of lower frame assemblies.
- The present invention is a rotatable work machine that includes a lower frame assembly having an open area in which the operator portion of an upper frame assembly and power source are at least partially positioned. This serves to reduce the overall height of the work machine to the point where it can easily access enclosed work areas or buildings having space constrained entryways. Additionally, specific positioning of the various components at a lower level on the work machine provides a low center of gravity with improved operator visibility. Further, the manufacturing and assembly of the work machine is such that costs and complexity are reduced.
- FIG. 1 is a diagrammatic, perspective representation of the present invention featuring an improved rotatable and telescopic work machine;
- FIG. 2 is the diagrammatic, perspective representation of the work machine of FIG. 1 with an upper frame assembly rotated in relation to a lower frame assembly;
- FIG. 3 is a side view of the work machine showing the location and positioning of a cab assembly and various components in relation to the upper and lower frame assemblies;
- FIG. 4 is a side view of the work machine with some components removed to show the cab assembly pivoted forward to a maintenance position;
- FIGS. 5a-5 e are diagrammatic, perspective representations showing the various stages for manufacturing and assembling the work machine;
- FIG. 6 is a diagrammatic, panoramic view from inside the cab assembly of the work machine as would be seen by an operator seated therein;
- FIG. 7 is a diagrammatic, section view, taken along line7-7 in FIG. 3, showing a step area for accessing the cab assembly of the work machine;
- FIG. 8 is a diagrammatic side view of the work machine with various components removed to outline the cab assembly and surrounding components in relation to a pair of axle assemblies; and
- FIG. 9 is a partial, perspective view of a slew ring assembly used on the work machine to achieve rotational movement of the upper frame assembly.
- While the invention is open to various modifications and alternative forms, a specific embodiment thereof has been shown by way of example in the drawings and will herein be described in detail. However, there is no intent to limit the invention to the particular form disclosed.
- Referring to the drawings, a rotatable and
telescopic work machine 10 is shown. It should be understood that although the work machine shown includes telescopic capabilities, any work machine having an upper rotatable portion is conceivably within the scope of the invention. Thework machine 10 has afront end portion 14, arear end portion 18 and acentral portion 22 through which avertical axis 26 extends. - The
work machine 10 includes amainframe assembly 34, seen best in FIGS. 3-4, that is supported against theground 38 by driving means, such as a pair of front andrear wheels wheels wheels bottom surfaces midpoint 54 located substantially at the mid-portion of thewheels wheels work machine 10 through a pair ofaxle assemblies power source 64, such an internal combustion engine, is hydraulically connected with a pair ofmotors swivel coupling 76. It should be understood that any other suitable device or means, such as mechanical, electrical or electronic, may be used to transmit power to theaxle assemblies work machine 10 over a variety of terrains (not shown). Acooling system 78 is connected with thepower source 64 and is used for cooling various fluids used within thework machine 10. - As seen best in FIGS. 5a-5 e and 7-8, the
mainframe assembly 34 includes alower frame assembly 80 and anupper frame assembly 84. As will be described in more detail below, the lower andupper frame assemblies predetermined method 86 to achieve various size configurations for thework machine 10. Thelower frame assembly 80 has abody portion 88 that includes afront end 92, arear end 96, a substantially planartop surface 100, a substantially planarbottom surface 104 and a predetermined vertical height H1 measured between the bottom andtop surfaces body portion 88 further includes an inner,open area 108 that is recessed therein to define afloor 112 adjacent thebottom surface 104 and accessible with theground 38. Aledge 116 extends from thebody portion 88 between the top andbottom surfaces area 108. A pair ofarms body portion 88 at the respective front andrear ends axle assemblies body portion 88. Although thebody portion 88 andarms body portion 88 may be constructed in any suitable manner, such as by any suitable molding process, as long as a strong and reliable support platform is created. Afoot holding area 128 is defined within thebody portion 88 between the bottom andtop surfaces tread plate 132, shown in FIG. 7, is connected on thetop surface 100 of thebody portion 88 and is operative with thefoot holding area 128 to assist an operator (not shown) during ingress to or egress from thework machine 10. - As seen best in FIGS.1-2 and 5 a-5 e, pairs of spaced front and rear stabilizer leg assemblies, one of which is shown at 140, are pivotally connected via a mounting
bracket 144 at each of the front andrear ends lower frame assembly 80. Thestabilizer leg assemblies 140 are movable diagonally outward from a fully retractedposition 148 to a fullyextended position 152. As shown in FIGS. 1-2, the rearstabilizer leg assemblies 140 are positioned between therear wheels 44 when in the fully retractedposition 148 and positioned outside therear wheels 44 when in the fullyextended position 152. Similarly, the frontstabilizer leg assemblies 140 are positioned between thefront wheels 42 when in the fully retractedposition 148 and positioned outside thefront wheels 42 when in the fullyextended position 152. Thestabilizer leg assemblies 140 define an outline orfootprint 156 having a substantially square configuration when in theextended position 152 and in contact with theground 38. - Referring now more specifically to FIGS. 5a-5 e, the
upper frame assembly 84 has alower portion 160 positioned within the recessedarea 108 of thelower frame assembly 80 and an upper orsupport portion 164 extending from thelower portion 160. Theupper frame assembly 84 has a predetermined height H2 that is measured between the lower andupper portions lower frame assembly 80. Thelower portion 160 includes anoperator portion 168 with front andrear ends enclosure portion 180 adjacent theoperator portion 168. Theupper portion 164 includes a pair of spacedtower assemblies rear end 172 of theoperator portion 168 that define a substantiallynon-obstructed viewing area 196 from therear end 172 of theoperator portion 168 to the surrounding terrain (not shown). Thetower assemblies wall 200 extending therebetween that substantially separates theoperator portion 168 from theenclosure portion 180. The reinforcingwall 200 defines arear window 204 therethrough that is operative with the substantiallynon-obstructed viewing area 196. Thepower source 64 is connected at thelower portion 160 of theupper frame assembly 84 and positioned within theenclosure portion 180 and substantially between thetower assemblies counterweight 206 is positioned at theupper portion 164 and spaced from thepower source 64. A portion of thecooling system 78, such as aheat exchanger 207, may be positioned within theupper portion 164 adjacent thetower assemblies counterweight 206. It should be understood that one ormore heat exchangers 207 may be positioned within theupper portion 164. - As seen best in FIG. 7, a laterally extending
shelf 208 is connected between the upper andlower portions upper frame assembly 84. Theshelf 208 has upper andlower surfaces top surface 100 of thelower frame assembly 80. Atread ring 220 is connected at theupper surface 212 of theupper shelf 208 in mating relationship with thetread plate 132 to define a substantiallyplanar step area 224 therebetween that provides amethod 226 for the operator (not shown) to access thework machine 10. Although thetread plate 132 andtread ring 220 are shown as separate components connected with the respective lower andupper frame assemblies top surface 100 of thelower frame assembly 80 and theupper surface 212 of theupper frame assembly 84 may be textured to provide anequivalent step area 224 without the use of the separate tread plate andring - As seen most clearly in FIG. 9, rotation means240, such as a slew ring assembly, is connected between the upper and
lower frame assemblies upper frame assembly 84 around thelower frame assembly 80. It should be understood that other rotation means, such as any suitable gearing or bearing system, may be used in place of the slew ring assembly and still be within the scope of the invention. Theslew ring assembly 240 is substantially positioned within the recessedarea 108. Theslew ring assembly 240 has a first,inner ring portion 244 with an inner surface having a plurality ofteeth 248, a second,outer ring portion 252 and abearing assembly 256 positioned between the inner andouter ring portions outer ring portions opening 260 therethrough through which thelower portion 160 of theupper frame assembly 84 is positioned. The positioning of theupper frame assembly 84 in such a manner correspondingly positions theoperator portion 168 andenclosure portion 180 at least partially within the recessedarea 108. Theinner ring portion 244 is connected with an upper surface on theledge 116 of thelower frame assembly 80. Theouter ring portion 252 is connected with thelower surface 216 on theshelf 208 of theupper frame assembly 84. Adrive gear 264 is connected with theupper shelf 208 and extends inwardly for positioning within the recessedarea 108. Theouter ring portion 252 and the drive gear 228 are positioned in a spaced relationship on opposite sides of theinner ring portion 244. The drive gear 228 is powered in any suitable manner, such as through a drive motor (not shown), and engages with the plurality ofteeth 248 to facilitate the rotation of theupper frame assembly 84 about thevertical axis 26 via the propulsion of theouter ring portion 252 around theinner ring portion 244 as allowed by the bearingassembly 256. Although theslew ring assembly 240 is shown having separate inner andouter ring portions lower frame assemblies slew ring assembly 240, may be utilized between the upper andlower frame assemblies - As seen best in FIGS.3-6 and 8, an operator station or
cab assembly 270 is connected with theupper frame assembly 84 at pivot joint 274 for rotation therewith about thevertical axis 274. Thecab assembly 270 has alower portion 276 positioned within theoperator portion 168 for partial seating within the recessedarea 108. Thecab assembly 270 is moveable at the pivot joint 274 between anoperating position 278, shown in FIG. 3, that substantially encloses theoperator portion 168 and amaintenance position 282, shown in FIG. 4, that allows access to thepower source 64,swivel coupling 76, and various other surrounding components. Thecab assembly 270 includes aseat 286 therein for seating a portion of an operator's body (not shown) within the recessedarea 108. Steering means 290 adjacent theseat 286 is connected with thepower source 64 for driving thewheels cab assembly 270 to prevent the rotation of theupper frame assembly 84 if desired by the operator (not shown). It should be understood that any other suitable means, such as mechanical or electronic, may be used to prevent the rotation of theupper frame assembly 84. - A
boom assembly 300 is pivotally mounted at theupper portion 164 of theupper frame assembly 84 for rotation therewith about thevertical axis 26. Theboom assembly 300 is positioned above theoperator portion 168 opposite thelower frame assembly 80. Theboom assembly 300 is moveable between a loweredposition 304, shown in FIG. 3, that defines a spaced and parallel relationship with thelower frame assembly 80 and a plurality of angled positions, one of which is shown in FIG. 4 at 308. It should be understood that an angled position, such as that shown at 308, is necessary in order for thecab assembly 270 to pivot to themaintenance position 282. Theboom assembly 300 is also moveable telescopically between a retractedposition 312, shown in FIG. 3, and a plurality of extended positions, one of which is shown in FIG. 4 at 316. An implement 320, such as forks, is positioned at the front end of theboom assembly 300 in a well-known manner. It should be understood that any implement may be utilized with theboom assembly 300 other than that shown. Theboom assembly 300 traverses thevertical axis 26, as seen best in FIG. 6, and is positioned in the manner described so that a substantiallynon-obstructed viewing area 324 is established from thefront end 172 of theoperator portion 168, where an operator (not shown) is seated, to the implement 320. - Referring more specifically to FIG. 3, the
boom assembly 300 is spaced from theground 38 at its connection with theupper frame assembly 84 to define a mounting height H3 that allows for an elevated swing radius height H4 for thework machine 10 that is equal to or greater than six feet. Thewheels lower frame assembly 80,upper frame assembly 84 andboom assembly 300 define an overall work machine height H5. The work machine height H5 is substantially equal to the clearance height H3 and, preferably, equal to or greater than six feet and less than nine feet. - Referring to FIGS. 5a-5 e, the
method 86 of manufacturing and assembling thework machine 10 to achieve various size configurations is shown. Themethod 86 involves manufacturing a plurality oflower frame assemblies 80 having various sizes, measured by length, width, height or shape, as seen in FIG. 5a. However, each of thelower frame assemblies 80 is manufactured with the recessedarea 108 being of a common and predetermined size. A plurality ofupper frame assemblies 84 is also manufactured. A selectlower frame assembly 80 is identified that provides and corresponds with a desired size configuration of thework machine 10, as depicted in FIG. 5b. As shown in FIG. 5c, thelower portion 160 of one of theupper frame assemblies 84 is positioned through and into the recessedarea 108 of the selectlower frame assembly 80 and connected therewith to define thestep area 224 for accessing thework machine 10. Theupper frame assembly 84 is rotatable about thevertical axis 26 relative to the selectlower frame assembly 80 as allowed by theslew ring assembly 240. Thepower source 64 is also positioned through and partially into the recessedarea 108 for connection and rotation with theupper frame assembly 84. As shown in FIG. 5d, thelower portion 276 of thecab assembly 270 is positioned through and recessed into thelower portion 160 of theupper frame assembly 84 for pivotal connection and rotation therewith, as described previously. Referring to FIG. 5e, theboom assembly 300 and attached implement 320 are connected at theupper portion 164 of theupper frame assembly 84. Thecounterweight 206 andheat exchanger 207 are positioned adjacent theboom assembly 300 at theupper portion 164 of theupper frame assembly 84 to complete the assembly of thework machine 10. - The position of the
power source 64 is such that is acts as a low counterweight for thework machine 10. Theheat exchanger 207 is positioned adjacent thecounterweight 206 and operative therewith to act as a high counterweight for thework machine 10 in conjunction with thepower source 64 throughout rotation of theupper frame assembly 84 about thevertical axis 26 to improve stability of thework machine 10, especially during lifting operations. Further, the positioning of the major components, as described and shown, lowers the center of gravity to enhance stability and performance attributes of thework machine 10. In particular, thetop surface 100 of thelower frame assembly 80 is maintained at or below thetop surface 46 of thewheels bottom surface 104 of thelower frame assembly 80 is maintained at or below themidpoint 54 of thewheels power source 64 and the high position of theheat exchanger 207 allow thenon-obstructed viewing area 196 for the operator (not shown) from therear end 176 to the surrounding terrain (not shown). Finally, the positioning of theboom assembly 300 at theupper portion 164 of theupper frame assembly 84 for traversing thevertical axis 26 allows thenon-obstructed viewing area 324 for the operator (not shown) from thefront end 172 to the implement 320. - Preferably, it should be understood that the plurality of
lower frame assemblies 80 are manufactured with a consistent length, width, height or shape. In this methodology, thestabilizers leg assemblies 140,boom assembly 300, andcounterweight 206 may be manufactured to establish the varying work machine size configurations without changing the length, width, height or shape of thelower frame assemblies 80. Therefore, thestabilizer leg assemblies 140,boom assemblies 300, andcounterweights 206 are the only components that must be manufactured in different sizes to produce awork machine 10 of varying size configurations. In particular, thestabilizer leg assembly 140 may be of a telescopic type, as shown in FIG. 5a, to enlarge thefootprint 156. Further, theboom assemblies 300 would be of various lengths and telescopic capability and the counterweights would correspond to the various size configurations of thework machine 10. The ability to change only thestabilizer leg assemblies 140,boom assembly 300, andcounterweight 300 instead of thelower frame assembly 80 reduces overall manufacturing costs by eliminating the necessity of manufacturing various sized and more complex and expensivelower frame assemblies 80. Further, the positioning and connection of the various sizedstabilizer leg assemblies 140,boom assemblies 300, andcounterweights 206 would remain substantially consistent on eachwork machine 10 to simplify the assembly process throughout the various size configurations. - Prior to operation, the operator (not shown) utilizes the
method 226 to access the machine by stepping from theground 38 to thefoot holding area 128 and onto thestep area 224 defined between the lower andupper frame assemblies cab assembly 270 by stepping down from the step area to thelower portion 276 thereof, which, simultaneously, positions a portion of the operator (not shown) within thelower portion 160 of theupper frame assembly 84. Due to the mating relationship between the lower andupper frame assemblies step area 224 is maintained throughout rotation of theupper frame assembly 84. In this manner, the operator (not shown) may easily access thework machine 10 at various locations around its periphery, reducing time and costs associated with other work machines having limited access locations. - During operation, the
upper frame assembly 84, including the other various rotatable components, such as thepower source 64,cab assembly 270 andboom assembly 300, may be rotated about thevertical axis 26 while thework machine 10 is moving or stationary. However, movement of thework machine 10 is enhanced between various locations because the low center of gravity establishes the low overall height H5 and enables thework machine 10 to enter space or height constrained areas. Further, while stationary, thestabilizers 140 are extended to achieve the substantiallysquare footprint 156 and improve the overall stability of thework machine 10. - Therefore, as can be easily understood from the foregoing, the design, manufacture, assembly, and operation of the
work machine 10 are improved to enhance stability, clearance, and operator visibility. - Other aspects, objects and advantages of the invention can be obtained from a study of the drawings, the disclosure and the appended claims.
Claims (53)
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FR0350477A FR2843982B1 (en) | 2002-08-29 | 2003-08-29 | SITE ENGINE WITH HIGHER ROTATING FRAME, IN PARTICULAR A TELESCOPIC SWIVEL MOUNT |
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WO2011152709A3 (en) * | 2010-05-31 | 2012-02-23 | Hudson Bay Holding B.V. | Mobile apparatus |
US20130149095A1 (en) * | 2010-05-31 | 2013-06-13 | Hudson Bay Holding B.V. | Mobile apparatus |
US9139980B2 (en) * | 2010-05-31 | 2015-09-22 | Hudson Bay Holding B.V. | Mobile apparatus |
USD778022S1 (en) * | 2015-02-12 | 2017-01-31 | Haulotte Group | Aerial lift |
USD783924S1 (en) * | 2015-08-05 | 2017-04-11 | Haulotte Group | Aerial lift cover |
USD785273S1 (en) * | 2015-08-05 | 2017-04-25 | Haulotte Group | Aerial lift cover |
ITUB20160931A1 (en) * | 2016-02-22 | 2017-08-22 | Energreen S R L | SELF-PROPELLED VEHICLE CONFIGURED TO BE EQUIPPED WITH WORKING TOOLS |
EP3210809A1 (en) * | 2016-02-22 | 2017-08-30 | Energreen S.r.l. | Self-propelled vehicle configured to be equipped with operating tools |
WO2019203970A1 (en) * | 2018-04-18 | 2019-10-24 | Caterpillar Inc. | Machine with a boom assembly |
US10508409B2 (en) | 2018-04-18 | 2019-12-17 | Caterpillar Inc. | Machine with a boom assembly and connection member |
US11041285B2 (en) | 2018-04-18 | 2021-06-22 | Caterpillar Inc. | Machine with a boom assembly |
US20200148518A1 (en) * | 2018-11-12 | 2020-05-14 | Manitou Italia S.R.L. | Telehandler with control system |
US11679970B2 (en) * | 2018-11-12 | 2023-06-20 | Manitou Italia S.R.L. | Telehandler with control system |
JP2023518008A (en) * | 2020-05-19 | 2023-04-27 | 山河智能装▲備▼股▲分▼有限公司 | Large machine with quick release mechanism for superstructure and undercarriage and loading and unloading method |
Also Published As
Publication number | Publication date |
---|---|
GB2392431A (en) | 2004-03-03 |
GB2392431B (en) | 2005-08-03 |
FR2843982A1 (en) | 2004-03-05 |
US7383906B2 (en) | 2008-06-10 |
FR2843982B1 (en) | 2005-12-23 |
GB0318972D0 (en) | 2003-09-17 |
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